1331333111420 has 48 divisors (see below), whose sum is σ = 3011252170080. Its totient is φ = 491505290496.

The previous prime is 1331333111417. The next prime is 1331333111443. The reversal of 1331333111420 is 241113331331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 1331333111420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696439 + ... + 2353841.

It is an arithmetic number, because the mean of its divisors is an integer number (62734420210).

Almost surely, 2^{1331333111420} is an apocalyptic number.

1331333111420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331333111420 is an abundant number, since it is smaller than the sum of its proper divisors (1679919058660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331333111420 is a wasteful number, since it uses less digits than its factorization.

1331333111420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665214 (or 665212 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 1331333111420 its reverse (241113331331), we get a palindrome (1572446442751).

The spelling of 1331333111420 in words is "one trillion, three hundred thirty-one billion, three hundred thirty-three million, one hundred eleven thousand, four hundred twenty".